Five Companies The Dropped The Ball This Week

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AMD Senior Vice President and CFO Thomas Seifert (pictured), who last year did an eight-month stretch as interim CEO, has resigned to pursue other interests. Investors didn't like this much, sending AMD shares down 7 percent in the wake of the announcement.

Seifert follows in the footsteps of Bob Feldstein, former AMD business development executive, who jumped to Nvidia in July. Last September, Emilio Ghilardi, former senior vice president and chief sales officer, along with Eric Demers, former CTO of AMD's Graphics Business Unit, left the company.

"We thank Thomas for his many contributions to AMD and for serving as interim CEO in 2011," current AMD CEO Rory Read said in a statement. "Thomas' personal commitment to the highest standards of accountability and financial integrity has helped define how AMD does business today."